Prob. with discharge or reset ?

Discussion in 'The Projects Forum' started by brozizds, Feb 14, 2012.

  1. Ron H

    AAC Fanatic!

    Apr 14, 2005
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    Did you read post 17? Are you sure the 555s have the same part number? All 555s are NOT equal.
     
  2. Wendy

    Moderator

    Mar 24, 2008
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    The only problem I have with the CMOS theory is the LEDs. Of course, I've been wrong before. Though thinking about it, a standard 555 should be a minimum of 15KΩ, which is pretty close to the 10KΩ value.

    Maybe not so far off base after all.
     
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  3. Ron H

    AAC Fanatic!

    Apr 14, 2005
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    I thought about the LEDs. They will approach an open circuit as the voltage across them drops. I don't know if that voltage is high enough prevent adequate discharge of C1 or not.
    I already mentioned the 15k divider in post #14.
     
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